Browse the built-in rotations and your own. Choose a rotation for each block or paddock in the tables on this page; build new ones with Create Custom Rotation.
Available Rotations
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Disclaimer
Important information about the use of this tool
This application is provided for general information and scenario analysis only. It does not constitute financial, legal, agronomic or other professional advice.
The calculations and outputs are based on user-supplied data and simplifying assumptions and may not reflect actual on-farm performance or your specific circumstances. You should obtain independent professional advice, including financial and agronomic advice, before making any business decisions.
This tool does not ask for personal information. The farm details you enter are held temporarily in your session so the calculator can work. They are not used for any other purpose, and they are deleted automatically 24 hours after your last activity, or straight away when you select Reset All. Saved configurations and Excel reports are downloaded to your own device and are not kept by this tool.
To the maximum extent permitted by law, CSIRO and the Grains Research and Development Corporation (GRDC) make no representations or warranties about the accuracy, completeness or suitability of the information or outputs generated by this tool and accept no liability for any loss, damage, cost or expense suffered by any person as a result of using or relying on this application or its outputs. Use of this tool and interpretation of its results is entirely at the user's discretion and risk.
User Guide
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Model Parameters
When changes apply: Used every time the results are worked out: a change applies to every machine, unless a machine has its own annual maintenance cost.
⚙️ Equipment Mechanism Preferences
Coming Soon: This feature is currently under development and will be available in a future release. Default preferences are being used.
🔧 Equipment Maintenance Rates
Configure maintenance cost parameters for different equipment types.
These settings affect ongoing repair and maintenance cost calculations.
Equipment Type
Base Repair Rate
Age Multiplier
Complexity Factor
Example Hours/Year*
Actions
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*Only used for the example maintenance figures in the equipment Configure window (Operating Costs tab). It doesn't change the results: the hours in the results come from the jobs each machine does.
⛽ Fuel Load Factors (Tractor-Powered Equipment)
Load factors represent the percentage of rated power used during operation.
These apply ONLY to tractor-powered equipment.
Equipment Type
Load Factor
Description
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Load Factor Guide:
High load (0.75-0.85): Heavy soil work.
Medium (0.65-0.75): Standard operations.
Low (0.25-0.40): Idling/light transport.
Very low (0.05-0.20): Intermittent PTO work.
When changes apply: Used every time the results are worked out, except tender labour times (copied onto new tenders) and contractor rates (copied onto jobs; jobs not edited by hand take the new rates when you save).
When changes apply: Starting values for machines you configure from now on. Machines already configured keep their own finance and depreciation: change those on the Equipment page.
When changes apply: Used every time the results are worked out. Speeds and efficiencies apply to machines that don't have their own.
🕒 Working Hours
The hours of the day each operation can run, for crewed and autonomous machines. When machines work a task together, each does a share based on its work rate and its hours per day, so an autonomous machine running around the clock covers more than a crewed one. Contractors use the crewed hours. A finish earlier than the start runs overnight; the same start and finish means all day (24 hours).
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🌧️ Environmental Zones
Configure weed burden indices for each rainfall zone. These affect spot spray chemical application rates during fallow spraying operations.
Rainfall Zone
Weed Burden Index
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⚡ Operational Parameters
Equipment efficiencies and working speeds loaded from equipment registry. Only shows equipment types enabled in Equipment Preferences. ASABE Field Efficiency ranges provided in brackets where available.
When changes apply: Used every time the results are worked out, except spot spray systems edited on a sprayer, which keep their own values.
When changes apply: Used every time the results are worked out: crop inputs, yields and Master Input costs apply to every crop that uses them.
🌾 Crop Registry
All available crops. Use Configure Crop Inputs button below to add missing rainfall zones.
Crop
Winter Crop
Summer Crop
Info
Actions
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Crop Configuration
Configure default inputs and management for each crop by rainfall zone.
🌾 Crop Yields
Configure expected yields for each crop by rainfall zone (t/ha). Used for rate-based equipment calculations and contractor estimates.
Crop
Low Rainfall
Medium Rainfall
High Rainfall
Straw Ratio
Actions
(t/ha)
(t/ha)
(t/ha)
(t straw per t grain)
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🔄 Rotation Library
Manage crop rotation sequences. These rotations are available for assignment in farm setup.
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Rotation Name
Type
Crop Sequence
Source
Actions
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⚗️ Master Input Library
Manage the library of crop inputs (seed, fertiliser, chemicals, seed treatments).
Changes to costs here will affect all crops using these inputs.
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Input Name
Category
Cost
Unit
Source
Actions
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🌾 Hay Yields
Hay yield (t/ha of hay) when a crop is cut for hay instead of harvested for grain. Silage tonnes are calculated from these using the dry matter values below.
Crop
Low Rainfall (t/ha)
Medium Rainfall (t/ha)
High Rainfall (t/ha)
Actions
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💧 Dry Matter
Silage is baled wetter than hay, so the same dry matter weighs more: silage t/ha = hay t/ha × hay DM ÷ silage DM.
📦 Bale Sizes & Weights
Bale weights by product, used to turn tonnes into bale counts. Bale dimensions are reference data and cannot be edited. Small square bales are not wrapped for silage.
Type
Display Name
Category
Metric
Straw (kg)
Hay (kg)
Silage (kg)
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Edit Input
Add New Input
Edit Spot Spray System:
Configure Harvesting Speeds by Crop
Set crop-specific working speeds for harvesting. The default header speed is set in the main Operational Parameters table.
Set in main table above. Used for crops without overrides.
Crop-Specific Overrides
Enable
Crop
Speed (km/h)
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Active overrides:0 crops
Configure Windrowing Speeds by Crop
Set crop-specific working speeds for windrowing. The default windrower speed is set in the main Operational Parameters table.
Set in main table above. Used for crops without overrides.
Crop-Specific Overrides
Enable
Crop
Speed (km/h)
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Active overrides:0 crops
Edit Maintenance:
Configure Crop Inputs by Rainfall Zone
Select Crop
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Rainfall Zone
Select a crop, then choose rainfall zone to configure inputs.
Select a crop to begin
Select a crop from the left panel to configure its inputs.
Add Input from Master List
Select an input from your Master Input Library to add to ( rainfall).
Input Name
Category
Cost
Unit
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Select Herbicide Type
Where should be applied?
Configure Crop Management Events by Rainfall Zone
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SELECT RAINFALL ZONE
Select a crop, then choose rainfall zone to configure management events.
Select a crop
Select a crop from the left panel to configure its management events.
Add New Crop
1
Basic Info
2
Inputs
3
Management
4
Review
Basic Information
Select when this crop is typically grown.
Please enter a crop name.
Display Name:
-
Select a crop to copy its inputs and management events as a starting point.
Configure Crop Inputs
Configure variable costs and inputs for each rainfall zone.
Note: You only need to configure rainfall zones relevant to your farm.
Click "Confirm" on each zone you want to include. At least one zone is required.
Important: In Step 3, you must configure management events for each zone you confirm here.
Configure Management Events
Configure the sequence of farming operations for each rainfall zone.
Note: Only configure management for the rainfall zones you confirmed in Step 2.
Click "Confirm" on each zone when done.
Review New Crop
Crop Name
Expected Yields
t/ha
t/ha
t/ha
You can edit yields for the rainfall zones you configured in Steps 2-3. Straw ratio determines baling calculations (straw = grain yield × ratio).
Inputs Configuration
Management Events
Choose an Icon
Popular Crop Icons
All Icons
Confirm Action
Update Contractor Rates
You have 0 task assignments using these rates.
Choose how to proceed:
Information
Build Custom Rotation
Will auto-fill as you select crops below
Note: This rotation will repeat indefinitely for as long as you run the model.